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Expanse

ABC Australia

Season 6 Expanse: The Nannup Four with Dominique Bayens

In 2007 four people disappeared from a blue farmhouse on the outskirts of the Western Australian town of Nannup, leaving behind the scatterings of a life, a note pinned to the door and a question: was the disappearance a choice… or murder?

As police and family try to piece the puzzle together to find the Nannup Four, what emerges is a bizarre story of secrets, hidden identities and rumours of a dark online cult.

In season six of ABC's award-winning Expanse podcast, host Dominique Bayens investigates the unsettling circumstances around the disappearance, speaking to the people left behind - who still question what they could have done differently.

Because when something like this happens, and you're left staring back, how do you live with the choices you've made?

Expanse is an internationally award-winning podcast that explores big stories from across Australia — a vast continent where anything can happen.

In Series 5: Nowhere Man, Erin Parke followed the story of a young American who dumped his bicycle and walked out into the Great Sandy Desert in remote northern Australia. He was an Alaskan firefighter, seemingly with everything to live for. So why did he risk it all to go into the wilderness alone? And how do you search for someone who doesn't want to be found?

In Series 4: Uncropped, host Danielle O'Neal goes from a mosquito-laden lagoon in far north Queensland to the Australian government's classified UFO files, to the US Congress as she seeks to understand what happened, its legacy and why believable people say seemingly unbelievable things.

Spies in the Outback (Series 3) won the Excellence in Radio Broadcasting award at the Northern Territory Media Awards in 2024 for the story of Pine Gap, a secret US/Australian defence base hidden in the outback.

From the Dead (Series 2) won silver in the Documentary: History category at the New York Radio Festival awards. It delves into a wild tale of survival at sea off Tasmania's rugged southwest coast.

Pink Diamond Heist (Series 1) was shortlisted in the New York Radio Awards, Documentary: History category. This season takes you on a rollicking ride through Western Australia on the trail of a diamond heist.

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  • 20 episodes
  • Avg 27 min
  • English

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  • S6 · E9
    April 27 · 20 min

    Behind the scenes | S6 host Dominique Bayens in conversation

    What goes into making a season of Expanse? What considerations are made when telling the stories of people's lives? Host of Expanse: The Nannup Four, Dominique Bayens, sits down with fellow podcast host Phil Vine to take you behind the curtain.

  • S6 · E7
    April 13 · 24 min

    BONUS | Who was Tony Popic?

    Since the podcast started rolling out, a lot of people have got in touch with information. Two people have been able to shed light on some previously unknown parts of the story. 

  • S6 · E6
    April 6 · 35 min

    06 Expanse: The Nannup Four | Northcliffe

    A family friend and former policeman continues to search for answers for Jim and Cath McDougall decades after the Nannup four vanished. The family and friends of Chantelle McDougall try to find their own answers, as one last glimmer of hope emerges. 

  • S6 · E5
    March 30 · 36 min

    05 Expanse: The Nannup Four | Simon says

    Jim and Cath McDougall are left reeling as the true depth of Simon Kadwill’s deception is revealed. Dominique tracks down people from his past, and hears from someone who has never spoken before who provides a startling insight into how Simon might have ended up on the path he did.   

  • S6 · E4
    March 23 · 34 min

    04 Expanse: The Nannup Four | A question of belief

    Tony Popic is talking about an end of days, Simon is seeing spirits and Chantelle is forced into a difficult decision as increasingly troubling hints something's not right come to light. 

  • S6 · E3
    March 16 · 33 min

    03 Expanse: The Nannup Four | Down the rabbit hole

    Dominique travels across the country to meet the two people who might be able to help her understand how Chantelle came to be living a reclusive life in a hidden corner of Western Australia, alongside a self-styled spiritual guru 18 years her senior.   

  • S6 · E2
    March 9 · 30 min

    02 Expanse: The Nannup Four | Selling snake oil

    A chance encounter in the streets of Melbourne in 1998 leaves a friend wondering what Chantelle McDougall has been pulled into. Dominique hears about the escalating pattern of control Simon Kadwill exercises over Chantelle. If you can add to this story, or have information you think might be important, please get in touch by emailing expanse.abc@proton.me. In this episode, we cover topics like: Chantelle McDougall and her daughter 5-year-old Leela vanished from Nannup, Western Australia in 20

  • S6 · E1
    March 2 · 30 min

    01 Expanse: The Nannup Four | The people in the blue house

    When three adults and a child disappear without a trace from the isolated bush community of Nannup in 2007, it sparks disturbing theories about what might have happened. What was going on in the little blue house, and could understanding that hold the key to the disappearance? Host Dominique Bayens starts unpicking the rumours of cults, hidden identities and bizarre behaviour. If you can add to this story, or have information you think might be important please get in touch by emailing expanse

  • February 23 · 3 min

    INTRODUCING — Expanse: The Nannup Four

    When four people disappeared from a blue farmhouse on the outskirts of the Western Australian town of Nannup in 2007, they left behind the scatterings of a life, a note pinned to their door and a question: was the disappearance a choice... or murder?  In season six of ABC’s multi-award winning Expanse podcast, host Dominique Bayens investigates how those left behind have come to terms with what happened. 

  • S5 · E7
    Aug 19, 2025 · 23 min

    BONUS Expanse: Nowhere Man | Gunslinger

    The search for Robert Bogucki brought together a cast of colourful characters, including a cigar-toting, moustachioed American named Garrison ‘Gunslinger’ St Clair.    

  • S5 · E6
    Aug 5, 2025 · 33 min

    06 Expanse: Nowhere Man | Lost and found

    A quarter of a century after he survived the Great Sandy Desert, Robert Bogucki is back for an odd-couple road trip with the Aboriginal tracker who helped search for him all those years ago. 

  • S5 · E5
    Jul 29, 2025 · 30 min

    05 Expanse: Nowhere Man | Miracle in the desert

    After almost six weeks in the desert, Robert Bogucki is found alive in what quickly becomes known as ‘The miracle in the desert’. But now he has to survive the tabloid television treatment and a fierce public backlash.

  • S5 · E4
    Jul 22, 2025 · 33 min

    04 Expanse: Nowhere Man | Alaska

    After years obsessing over the case, Erin Parke has made contact with the elusive and enigmatic Robert Bogucki.  

  • S5 · E2
    Jul 8, 2025 · 29 min

    02 Expanse: Nowhere Man | Trackers

    The clock is ticking to bring Robert Bogucki out of the desert alive, and police turn to Aboriginal trackers to try to find their man.

  • S5 · E1
    Jul 1, 2025 · 29 min

    01 Expanse: Nowhere Man | Ghost in the desert

    When a bicycle is found abandoned on a remote track in the Great Sandy Desert it triggers an urgent search. Who is this mystery man and why has he walked into one of Australia’s deadliest landscapes?  

  • Jun 24, 2025 · 3 min

    INTRODUCING — Expanse: Nowhere Man

    It’s 1999, and a young American man is missing in the Australian outback. Police soon realise there’s something very strange about this case – the man appears to have plunged into the desert on purpose, and seemingly doesn’t want to be found.

  • S4 · E5
    Nov 25, 2024 · 38 min

    05 Uncropped | The legacy

    A bombshell is dropped in US Congress that makes a lot of people start thinking about UFOs, now called UAP, differently. Danielle O’Neal tries to understand the implications of everything she’s heard and grapples with the unanswered questions.  

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